Java screen scraper and on the fly DOM updater like jquery?

jQuery has powerful on the fly DOM manipulation API like selector.html() gets the html of the spec开发者_开发知识库ified selector and selector.html(replacement html) replaces html. I am looking for same thing but in Java. Is there such a Java library? It should also be very fast.

Try JSoup. It has a an API inspired by jQuery and can handle most HTML pages you throw at it.